question_answer

A sulphite salt on treatment with dil. \[{{H}_{2}}S{{O}_{4}}\] liberates a gas which

A)  Turns \[Pb{{(OAc)}_{2}}\] paper black

B)  Bums with blue flame

C)  Smells like vinegar

D)  Turns acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] paper green

Correct Answer: D

Solution :

 is evolved.